William f



'w. F. PARKER.

Metal Driil I No. 64,357. Patented April 30, I867.

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IMPROVED DRILLING MAGHINE.

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Be it known that I, WILLIAM F. PARKER, of Andover, in the county ofEssex, and Gommonwealth of Massachusetts, have invented a new and usefulMachine for Drilling or Boring; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, referencebeing had to the annexed drawings,making a part of this specification, in which Figure l is a side view ofmachine when used as a Scotch drill.

Figure Qrepr'esents an end view of machine when used as a Scotch drill.

Figure 3 represents a side view of machine when used as a ratchet drill.

Figure 4 is an end view of machine when used as a ratchet drill.

Figure 5 represents an interior side view of machine.

Figure 6 represents the feeding part of the machine. I

Figure 7 represents a vertical viewof the feeding part of the machine. 7

A is the shaft to which the power is applied to move the machine, whichis done by means of the crank B which passes through the shaft A and isfastened by the screw 0 in the shaft A at any point desired, so as togive the crank alonger or shorter leverage as may be desirable. Theshaft A passes through the frame of the machine D and is fastened in thebevelled cog-wheel E, and this cog-wheel E works in a similar cog-wheelon the vertical drilling-shaft F, andsaid cog-wheel is fastened to thedrilling-shaft by-agkey, the key being made 'smaller than the groove Gin the drilling-shaft, so that the drilling-shaft may 51 p or down inthe cogwheel when the machine is used. In the lower end of thedrilling-shaft F is inserted drill, as sec H. The upper end of thedrilling-shaft F is a hollow cylinder, with threads cut on the interiorsurface of said cylinder to receive the threads of the screw I; thisscrew may be longer or shorter according to the depth of the holes to bebored or drilled by 'the machine. The screw I is made as other screws,with this exception, that in the screw I a slot or groove is made thewhole length of it to receivc the knob on the interior surface of theratchetwhcel K. Upon the upper end of the screw I is a head with a pointat the top, which moves in a cavity in an iron-plate, q, and turns as ona pivot. On this screw I there is a ratchet-wheel, K, having the screwfor its axle (there being no threads cut on the interior surface of theratchet-wheel) having a knob on its interior surface which moves freelyup and down in a slot or groove in the screw 1, above described, so thatwhen the ratchet-wheel K turns the screw I must also turn. Justbelow-theratchet-wheel K is a cam-wheel, M, the diameter of which is alittle larger than the diameter of the ratchet K, and is fixed firmly bya screw to the top of the drilling-shaft F, and serves to keep the pawlN from coming in contact with the teethof the ratchet- P wheel K exceptat one place, 0, fig. T, where the canr is cut away so that the pawl maycome in contact with the ratchet-wheel teeth. .This opening 0 (see fig.T) maybe closed more or less by the slide P, which is fastened to thedrilling-shaft F, and which may be moved along in its slot so as to letmore or less of the teeth of the ratchet K come in contact with the pawlNduring each revolution of the drilling-shaft according to the desire tofeed faster or slower. N is a pawl which is pressed against the cam Mand ratchet-wheel K by spiral springs R B; said springs are set in theframe D of the machine, and the pawl is kept in position by an arm ofthe pawl passing through the frame of the machine. This pawl N isprevented from touching the ratchet-wheel teeth by the cam M except atthe space 0, where th'cpawl comes in contact with one or more teeth ofthe ratchet-wheel K. The ratchet-wheel K and thepawl N are to turn thescrew I, and thus force down the drill into the article to be bored ordrilled, but it would feed too fast, therefore the cam M is put on forthe purpose of keeping the pawl from the ratchet-wheel the larger partof each revolution. Enough of the cam M is cut away to allow enough ofthe teeth of the ratchet to come in contact with the pawl N to cause themachine to feed as fast as the machine could drill or bore in any metal,and to regulate-the feed so as to drill any metal, hard or soft, theslide P is made to close part of the opening 0 in the cam M, and socause the machine to feed fast or slow, as desired. It will be seen that'the fewer number of teeth of the ratchet-wheel which are exposed to ithe pawl the slower the machine will feed. The machine is fastened to abench or table when used as a Scotch drill by means of a hand vise, thejaws of which, S S,;fig. 1, grasp the bench T and are made fast by thescrews U U, one of which is longer than the other, and passes up throughthe slot in the arm V and'is made tight .hy the nut W pressing the arm Vdown on to a shoulder on the screw U. The arm V having a slot thescrewmayhe moved along in it at pleasure so as to bore or drill seriesof holes, as maybe desired. The arm V is firmly attached to the machineby a. screw at X. When the machine is iised as a ratchet-drill, I simplytake off the top piece of theframe Q of the machine, and rest the topend of the screw I against one side of say a door-way and bore into theother side of the door-way, butif the door-way is too wide for themachinen block may be set against the end of the screw 1, and themachine is in position to bore or drill.

lhe machine being in position as described, when used either as a Scotchdrill or a ratchet-drill, the method is the same in both cases simply byturning the crank B, which causes the bevel-gears E E to move or turn,

and with them the drilling-shaft F with the cam-wheel M and slide P,they both being fastened to the drilling-v shaft, and as the shaft turnsthe pawl N slides around on the cam M until it comes to the part of thedisk 0 which is cut away, when the pawl N comes in Contact with theteeth of the ratchet-wheel K, causing'it to, trim and with it the screwI, thus forcing by the screw the drill downward into the articlc to bebored, butso'on the pawl strikes the other side of the opening 0 in thecam and is forced back, and passes along on the disk of the cam until itcomes to the opening, when the machine will feed as before.

1. I claim the combination of the pawl N with the ratchet-wheel K, thecam M, and the slide P, for the purposes herein set forth and described.I

2. In combination with the subject-matter of the foregoing clause, andwith the supporting frame, I claim the top piece Q, arranged asdescribed.

-WILLIAM F. PARKER. [Ls] Witnesses:

JAMES K. BARKER, CHARLES M. FELLows.

